Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35cfc0d53eac3aecd3b9133b81eba8148eb0c425ab50b172cc6c55f21dc27719' 
  AND token = 'XxFFwvPtuiIodYg8zP4mLzlgfN6v5RxzWM+5kT1bxa0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}